Hi Hugh,
my pennies:
a) takes ages to start standalone or as vst-plugin (about 2min)
b) takes the same time to come up after hiding the plugin (not restarting, but hiding/showing)
(-> might be a graphic refreshing problem, not the synth itself?)
c) after appearing some erratic behaviour of the GUI (similar to Giovanni’s screenshot above)
d) some problems with using knobs and handles (delayed, as I mentioned for version 2.01), but this sometimes gets better after a while

-> not fully tested the sound but no problems till now
-> parallel working Circle1 is all ok
-> Windows 7/64 Ableton Live 9.5
Dirk